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| ANALYSIS OF POUNDING EFFECT OF IRREGULAR GIRDER BRIDGES UNDER TRANSVERSE EARTHQUAKE
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Wang Junwen 1; Li Jianzhong 2; Fan Lichu 2 |
| 1. School of Civil Engineering, Shijiazhuang Railway Institute, Shijiazhuang, 050043, China；2. Department of Bridge Engineering, Tongji University, Shanghai, 200092, China |
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Abstract In this paper, based on pounding phenomenon of continuous girder bridges between girder and retainers under transverse earthquakes, a simplified model that considers the nonlinear behaviors of bearings and the elasto-plastic behaviors of piers was developed to study the effects of pounding. This model is used to analyze pounding effects of irregular girder bridges between girder and retainers under transverse earthquakes by the nonlinear time history analysis method, to investigate the measures to mitigate pounding and limit the relative displacement. The results show that pounding can lead to strong pounding force and amplify the responses of piers．Installation of the rubber shock absorbing devices inside retainers significantly reduces the impact force between the girder and retainers, also reduces the displacement at the top and plastic rotation at the bottom of dwarf piers, but the displacement at the top and plastic rotation at the bottom of tall piers are amplified observably.
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Received: 17 August 2009
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2010, Vol. 29 
